I use this shade cloth.
https://www.lowes.com/pd/Easy-Gardener-Shade-Fabric-By-the-Foot/3037772
I have had the same cloth for 7 years and it is still going strong. Best investment I ever made for chicken comfort.
Air and water flow through with no problem. If I need an area to have heavier shade I double it up.
I take it down before snow happens so it doesn't get stretched out.
Just got all my shade cloths up yesterday, added another this year...
....am always torn between the much needed shade and the reduced air flow.
I have some 70% and the new 90%...both air and rain goes thru, but air flow is reduced making it stuffy when humid unless wind is coming from the 'right' direction.
I've used tarps too, total shade but no airflow, and watch out for rain runoff or worse rain collection.
Left most is new cloth, tarp there last year was a disaster every time it rained I had to go take it down.
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Let me clarify what I wrote up there.
In 7 years I have not had water pool on a shade cloth nor have I had one billow up or catch the wind.